Pump Plunger Assemblies
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AVANTOR MASTERFLEX (VWR LLC) MASTERFLEX PERI PUMP REPL BRSH
NC2888570 MASTERFLEX PERI PUMP REPL BRSH
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Cole-Parmer Vacuubrand 669041 Flange Adapter Vacuum Pump Fitting, Aluminum, NW 16 to NW 25
Adapters fit almost every kind of vacuum pump and accessory. Be sure to order clamps and co-seal or centering ring .
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Electron Microscopy Sciences Optical Resolution Grating with Ronchi Ruling 20 lines/ mm
Metallic grating pattern on glass squares with opaque lines approximately 50% of the pitch. Stock items are on 50 mm x 50 mm squares of glass 1.5 mm thick. The glass is B270 with refractive index of 1.52. Mutually perpendicular pairs produce a screen of square apertures. Vacuum deposited chrome gratings on glass substrate. Typically used for testing of resolution, field distortion and parfocal stability, but may be paired to provide interference patterns. 50mm x 50mm B270 glass. 20 lines per mm ruled over full area.
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